chore: Revert update to vite-plugin-svelte #1817

Job	Run time
clippy	23s
cargo_test	41s
nix_build	2m 18s
rustfmt	12s
testbuild (svelte)	8m 58s
testbuild (vue)	10m 15s
testbuild (lit)	9m 27s
testbuild_by_scope (hello_world)	4m 28s
testbuild (react)	9m 20s
testbuild_by_scope (holo_integration)	2m 27s
testbuild (vanilla)	9m 14s
	57m 43s

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